<?xml version="1.0"?>

<!DOCTYPE bindings [
  <!ENTITY % videocontrolsDTD SYSTEM "chrome://global/locale/videocontrols.dtd">
  %videocontrolsDTD;
]>

<bindings id="videoControlBindings"
   xmlns="http://www.mozilla.org/xbl"
   xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
   xmlns:xbl="http://www.mozilla.org/xbl"
   xmlns:svg="http://www.w3.org/2000/svg">

  <binding id="timeThumb"
           extends="chrome://global/content/bindings/scale.xml#scalethumb">
      <xbl:content xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
          <xbl:children/>
          <hbox class="timeThumb" xbl:inherits="showhours">
              <label class="timeLabel"/>
          </hbox>
      </xbl:content>
      <implementation>

      <field name="timeLabel">null</field>
      <constructor>
          <![CDATA[
          this.timeLabel = document.getAnonymousElementByAttribute(this, "class", "timeLabel");
          this.timeLabel.setAttribute("value", "0:00");
          ]]>
      </constructor>

      <property name="showHours">
        <getter>
          <![CDATA[
          return this.getAttribute("showhours") == "true";
          ]]>
        </getter>
        <setter>
          <![CDATA[
          this.setAttribute("showhours", val);
          // If the duration becomes known while we're still showing the value
          // for time=0, immediately update the value to show or hide the hours.
          // It's less intrusive to do it now than when the user clicks play and
          // is looking right next to the thumb.
          var displayedTime = this.timeLabel.getAttribute("value");
          if (val && displayedTime == "0:00")
              this.timeLabel.setAttribute("value", "0:00:00");
          else if (!val && displayedTime == "0:00:00")
              this.timeLabel.setAttribute("value", "0:00");
          ]]>
        </setter>
      </property>

      <method name="setTime">
          <parameter name="time"/>
          <body>
          <![CDATA[
              var timeString;
              var hours = Math.floor(time / 3600000);
              var mins  = Math.floor(time % 3600000 / 60000);
              var secs  = Math.floor(time % 60000 / 1000);
              if (secs < 10)
                  secs = "0" + secs;
              if (hours || this.showHours) {
                  if (mins < 10)
                      mins = "0" + mins;
                  timeString = hours + ":" + mins + ":" + secs;
              } else {
                  timeString = mins + ":" + secs;
              }

              this.timeLabel.setAttribute("value", timeString);
          ]]>
          </body>
      </method>
      </implementation>
  </binding>

  <binding id="suppressChangeEvent"
            extends="chrome://global/content/bindings/scale.xml#scale">
    <implementation implements="nsIXBLAccessible">
      <!-- nsIXBLAccessible -->
      <property name="accessibleName" readonly="true">
        <getter>
          if (this.type != "scrubber")
              return "";

          var currTime = this.thumb.timeLabel.getAttribute("value");
          var totalTime = this.durationValue;

          return this.scrubberNameFormat.replace(/#1/, currTime).
              replace(/#2/, totalTime);
        </getter>
      </property>

      <!-- Public -->
      <field name="scrubberNameFormat">"&scrubberScale.nameFormat;"</field>
      <field name="durationValue">""</field>

      <field name="thumb">null</field>
      <field name="valueBar">null</field>
      <field name="isDragging">false</field>
      <field name="wasPausedBeforeDrag">true</field>
      <field name="type">null</field>
      <field name="Utils">null</field>
      <constructor>
          <![CDATA[
          this.thumb = document.getAnonymousElementByAttribute(this, "class", "scale-thumb");
          this.type = this.getAttribute("class");
          this.Utils = document.getBindingParent(this.parentNode).Utils;
          if (this.type == "scrubber")
              this.valueBar = this.Utils.progressBar;
          ]]>
      </constructor>

      <method name="valueChanged">
          <parameter name="which"/>
          <parameter name="newValue"/>
          <parameter name="userChanged"/>
          <body>
          <![CDATA[
            // This method is a copy of the base binding's valueChanged(), except that it does
            // not dispatch a |change| event (to avoid exposing the event to web content), and
            // just calls the videocontrol's seekToPosition() method directly.
            switch (which) {
              case "curpos":
                if (this.type == "scrubber") {
                    // Update the time shown in the thumb.
                    this.thumb.setTime(newValue);
                    // Update the value bar to match the thumb position.
                    var percent = newValue / this.max;
                    this.valueBar.value = Math.round(percent * 10000); // has max=10000
                }

                // The value of userChanged is true when changing the position with the mouse,
                // but not when pressing an arrow key. However, the base binding sets
                // ._userChanged in its keypress handlers, so we just need to check both.
                if (!userChanged && !this._userChanged)
                  return;
                this.setAttribute("value", newValue);

                if (this.type == "scrubber")
                    this.Utils.seekToPosition(newValue);
                else if (this.type == "volumeControl")
                    this.Utils.setVolume(newValue / 100);
                break;
  
              case "minpos":
                this.setAttribute("min", newValue);
                break;
  
              case "maxpos":
                if (this.type == "scrubber") {
                    // Update the value bar to match the thumb position.
                    var percent = this.value / newValue;
                    this.valueBar.value = Math.round(percent * 10000); // has max=10000
                }
                this.setAttribute("max", newValue);
                break;
            }
          ]]>
          </body>
      </method>

      <method name="dragStateChanged">
        <parameter name="isDragging"/>
          <body>
          <![CDATA[
            if (this.type == "scrubber") {
                this.Utils.log("--- dragStateChanged: " + isDragging + " ---");
                this.isDragging = isDragging;
                if (isDragging) {
                    this.wasPausedBeforeDrag = this.Utils.video.paused;
                    this.Utils.video.pause();
                } else if (!this.wasPausedBeforeDrag) {
                    // After the drag ends, resume playing.
                    this.Utils.video.play();
                }
            }
          ]]>
          </body>
      </method>

      </implementation>
  </binding>

  <binding id="videoControls">

    <resources>
        <stylesheet src="chrome://global/content/bindings/videocontrols.css"/>
        <stylesheet src="chrome://global/skin/media/videocontrols.css"/>
    </resources>

    <xbl:content xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
                 class="mediaControlsFrame">
        <stack flex="1">
            <vbox flex="1" class="statusOverlay" hidden="true">
                <box class="statusIcon"/>
            </vbox>

            <vbox class="controlsOverlay">
                <spacer class="controlsSpacer" flex="1"/>
                <hbox class="controlBar" hidden="true">
                    <button class="playButton"
                            playlabel="&playButton.playLabel;"
                            pauselabel="&playButton.pauseLabel;"/>
                    <stack class="scrubberStack" flex="1">
                        <box class="backgroundBar"/>
                        <progressmeter class="bufferBar"/>
                        <progressmeter class="progressBar" max="10000"/>
                        <scale class="scrubber" movetoclick="true"/>
                    </stack>
                    <vbox class="durationBox">
                        <label class="positionLabel" role="presentation"/>
                        <label class="durationLabel" role="presentation"/>
                    </vbox>
                    <button class="muteButton"
                            mutelabel="&muteButton.muteLabel;"
                            unmutelabel="&muteButton.unmuteLabel;"/>
                    <stack class="volumeStack" hidden="true" fadeout="true">
                        <box class="volumeBackgroundBar"/>
                        <scale class="volumeControl" orient="vertical" dir="reverse" movetoclick="true"/>
                    </stack>
                </hbox>
            </vbox>
        </stack>
    </xbl:content>

    <implementation implements="nsISecurityCheckedComponent">
        <!-- nsISecurityCheckedComponent -->
        <method name="canCreateWrapper">
            <parameter name="aIID"/>
            <body>
                return "AllAccess";
            </body>
        </method> 

        <method name="canCallMethod">
            <parameter name="aIID"/>
            <parameter name="aMethodName"/> 
            <body>
                return "AllAccess";
            </body>
        </method> 

        <method name="canGetProperty">
            <parameter name="aIID"/>
            <parameter name="aPropertyName"/> 
            <body>
                return "AllAccess";
            </body>
        </method> 

        <method name="canSetProperty">
            <parameter name="aIID"/>
            <parameter name="aPropertyName"/>
            <body>
                return "AllAccess";
            </body>
        </method> 

        <method name="QueryInterface">
            <parameter name="aIID"/>
            <body>
            <![CDATA[
            if (!iid.equals(Components.interfaces.nsISecurityCheckedComponent))
                throw Components.results.NS_ERROR_NO_INTERFACE;
            return this;
            ]]>
            </body>
        </method>

        <constructor>
            <![CDATA[
            this.Utils.init(this);
            ]]>
        </constructor>

        <field name="randomID">0</field>

        <field name="Utils">
            <![CDATA[ ({
                debug : false,
                video : null,
                videocontrols : null,
                controlBar : null,
                playButton : null,
                muteButton : null,
                volumeStack    : null,
                volumeControl  : null,
                durationLabel  : null,
                positionLabel  : null,
                scrubberThumb  : null,
                scrubber       : null,
                progressBar    : null,
                bufferBar      : null,
                statusOverlay  : null,

                randomID : 0,
                videoEvents : ["play", "pause", "ended", "volumechange", "loadeddata",
                               "loadstart", "timeupdate", "progress",
                               "playing", "waiting", "canplay", "canplaythrough",
                               "seeking", "seeked", "emptied", "loadedmetadata",
                               "error", "suspend"],

                firstFrameShown : false,
                timeUpdateCount : 0,
                maxCurrentTimeSeen : 0,
                lastDurationSeen : NaN,
                isAudioOnly : false,

                setupStatusFader : function(immediate) {
                    var show = false;
                    if (this.video.seeking ||
                        this.video.error ||
                        this.video.networkState == this.video.NETWORK_NO_SOURCE ||
                        (this.video.networkState == this.video.NETWORK_LOADING &&
                         (this.video.paused || this.video.ended
                           ? this.video.readyState < this.video.HAVE_CURRENT_DATA
                           : this.video.readyState < this.video.HAVE_FUTURE_DATA)) ||
                        (this.timeUpdateCount <= 1 && !this.video.ended &&
                         this.video.readyState < this.video.HAVE_ENOUGH_DATA &&
                         this.video.networkState == this.video.NETWORK_LOADING))
                        show = true;

                    this.log("Status overlay: seeking=" + this.video.seeking +
                             " error=" + this.video.error + " readyState=" + this.video.readyState +
                             " paused=" + this.video.paused + " ended=" + this.video.ended +
                             " networkState=" + this.video.networkState +
                             " timeUpdateCount=" + this.timeUpdateCount +
                             " --> " + (show ? "SHOW" : "HIDE"));
                    this.startFade(this.statusOverlay, show, immediate);
                },

                /*
                 * Set the initial state of the controls. The binding is normally created along
                 * with video element, but could be attached at any point (eg, if the video is
                 * removed from the document and then reinserted). Thus, some one-time events may
                 * have already fired, and so we'll need to explicitly check the initial state.
                 */
                setupInitialState : function() {
                    this.randomID = Math.random();
                    this.videocontrols.randomID = this.randomID;

                    this.setPlayButtonState(this.video.paused);
                    this.setMuteButtonState(this.video.muted);

                    var volume = this.video.muted ? 0 : Math.round(this.video.volume * 100);
                    this.volumeControl.value = volume;

                    var duration = Math.round(this.video.duration * 1000); // in ms
                    var currentTime = Math.round(this.video.currentTime * 1000); // in ms
                    this.log("Initial playback position is at " + currentTime + " of " + duration);
                    // It would be nice to retain maxCurrentTimeSeen, but it would be difficult
                    // to determine if the media source changed while we were detached.
                    this.maxCurrentTimeSeen = currentTime;
                    this.showPosition(currentTime, duration);

                    // If we have metadata, check if this is a <video> without video data.
                    if (this.video.readyState >= this.video.HAVE_METADATA) {
                        if (this.video instanceof HTMLVideoElement &&
                            (this.video.videoWidth == 0 || this.videoHeight == 0))
                            this.isAudioOnly = true;
                    }

                    // If the first frame hasn't loaded, kick off a throbber fade-in.
                    if (this.video.readyState >= this.video.HAVE_CURRENT_DATA)
                        this.firstFrameShown = true;

                    // We can't determine the exact buffering status, but do know if it's
                    // fully loaded. (If it's still loading, it will fire a progress event
                    // and we'll figure out the exact state then.)
                    this.bufferBar.setAttribute("max", 100);
                    if (this.video.readyState >= this.video.HAVE_METADATA)
                        this.showBuffered();
                    else
                        this.bufferBar.setAttribute("value", 0);

                    // Set the current status icon.
                    if (this.video.error || this.video.networkState == this.video.NETWORK_NO_SOURCE) {
                        this.statusIcon.setAttribute("type", "error");
                        this.setupStatusFader(true);
                    } else {
                        this.statusIcon.setAttribute("type", "throbber");
                        this.setupStatusFader();
                    }
                },

                get dynamicControls() {
                    // Don't fade controls for <audio> elements.
                    var enabled = !this.isAudioOnly;

                    // Allow tests to explicitly suppress the fading of controls.
                    if (this.video.hasAttribute("mozNoDynamicControls"))
                        enabled = false;

                    // If the video hits an error, suppress controls if it
                    // hasn't managed to do anything else yet.
                    if (!this.firstFrameShown && (this.video.error || this.video.networkState == this.video.NETWORK_NO_SOURCE))
                        enabled = false;

                    return enabled;
                },
                
                handleEvent : function (aEvent) {
                    this.log("Got media event ----> " + aEvent.type);

                    // If the binding is detached (or has been replaced by a
                    // newer instance of the binding), nuke our event-listeners.
                    if (this.videocontrols.randomID != this.randomID) {
                        this.terminateEventListeners();
                        return;
                    }

                    switch (aEvent.type) {
                        case "play":
                            this.setPlayButtonState(false);
                            this.setupStatusFader();
                            break;
                        case "pause":
                            // Little white lie: if we've internally paused the video
                            // while dragging the scrubber, don't change the button state.
                            if (!this.scrubber.isDragging)
                                this.setPlayButtonState(true);
                            this.setupStatusFader();
                            break;
                        case "ended":
                            this.setPlayButtonState(true);
                            // We throttle timechange events, so the thumb might not be
                            // exactly at the end when the video finishes.
                            this.showPosition(Math.round(this.video.currentTime * 1000),
                                              Math.round(this.video.duration * 1000));
                            this.setupStatusFader();
                            break;
                        case "volumechange":
                            var volume = this.video.muted ? 0 : Math.round(this.video.volume * 100);
                            this.setMuteButtonState(this.video.muted);
                            this.volumeControl.value = volume;
                            break;
                        case "loadedmetadata":
                            // If a <video> doesn't have any video data, treat it as <audio>
                            // and show the controls (they won't fade back out)
                            if (this.video instanceof HTMLVideoElement &&
                                (this.video.videoWidth == 0 || this.video.videoHeight == 0)) {
                                this.isAudioOnly = true;
                                this.startFadeIn(this.controlBar);
                            }
                            this.showDuration(Math.round(this.video.duration * 1000));
                            break;
                        case "loadeddata":
                            this.firstFrameShown = true;
                            this.setupStatusFader();
                            break;
                        case "loadstart":
                            this.maxCurrentTimeSeen = 0;
                            this.statusIcon.setAttribute("type", "throbber");
                            this.isAudioOnly = (this.video instanceof HTMLAudioElement);
                            this.setPlayButtonState(true);
                            break;
                        case "progress":
                            this.showBuffered();
                            this.setupStatusFader();
                            break;
                        case "suspend":
                            this.setupStatusFader();
                            break;
                        case "timeupdate":
                            var currentTime = Math.round(this.video.currentTime * 1000); // in ms
                            var duration = Math.round(this.video.duration * 1000); // in ms

                            // If playing/seeking after the video ended, we won't get a "play"
                            // event, so update the button state here.
                            if (!this.video.paused)
                                this.setPlayButtonState(false);

                            this.timeUpdateCount++;
                            // Whether we show the statusOverlay sometimes depends
                            // on whether we've seen more than one timeupdate
                            // event (if we haven't, there hasn't been any
                            // "playback activity" and we may wish to show the
                            // statusOverlay while we wait for HAVE_ENOUGH_DATA).
                            // If we've seen more than 2 timeupdate events,
                            // the count is no longer relevant to setupStatusFader.
                            if (this.timeUpdateCount <= 2)
                                this.setupStatusFader();

                            // If the user is dragging the scrubber ignore the delayed seek
                            // responses (don't yank the thumb away from the user)
                            if (this.scrubber.isDragging)
                                return;

                            this.showPosition(currentTime, duration);
                            break;
                        case "emptied":
                            this.bufferBar.value = 0;
                            break;
                        case "seeking":
                            this.showBuffered();
                            this.statusIcon.setAttribute("type", "throbber");
                            this.setupStatusFader();
                            break;
                        case "waiting":
                            this.statusIcon.setAttribute("type", "throbber");
                            this.setupStatusFader();
                            break;
                        case "seeked":
                        case "playing":
                        case "canplay":
                        case "canplaythrough":
                            this.setupStatusFader();
                            break;
                        case "error":
                            // We'll show the error status icon when we receive an error event
                            // under either of the following conditions:
                            // 1. The video has its error attribute set; this means we're loading
                            //    from our src attribute, and the load failed, or we we're loading 
                            //    from source children and the decode or playback failed after we 
                            //    determined our selected resource was playable.
                            // 2. The video's networkState is NETWORK_NO_SOURCE. This means we we're
                            //    loading from child source elements, but we were unable to select
                            //    any of the child elements for playback during resource selection.
                            if (this.video.error || this.video.networkState == this.video.NETWORK_NO_SOURCE) {
                              this.statusIcon.setAttribute("type", "error");
                              this.setupStatusFader(true);
                              // If video hasn't shown anything yet, disable the controls.
                              if (!this.firstFrameShown)
                                  this.startFadeOut(this.controlBar);
                            }
                            break;
                        default:
                            this.log("!!! event " + aEvent.type + " not handled!");
                    }
                },

                terminateEventListeners : function () {
                    for each (var event in this.videoEvents)
                        this.video.removeEventListener(event, this, false);
                    this.log("--- videocontrols terminated ---");
                },
                
                formatTime : function(aTime) {
                    // Format the duration as "h:mm:ss" or "m:ss"
                    let hours = Math.floor(aTime / 3600000);
                    let mins  = Math.floor(aTime % 3600000 / 60000);
                    let secs  = Math.floor(aTime % 60000 / 1000);
                    let timeString;
                    if (secs < 10)
                        secs = "0" + secs;
                    if (hours) {
                        if (mins < 10)
                            mins = "0" + mins;
                        timeString = hours + ":" + mins + ":" + secs;
                    } else {
                        timeString = mins + ":" + secs;
                    }
                    return timeString;
                },

                showDuration : function (duration) {
                    if (isNaN(duration))
                        duration = this.maxCurrentTimeSeen;
                    if (duration == this.lastDurationSeen)
                        return;
                    this.lastDurationSeen = duration;
                    this.log("Duration is " + duration + "ms");

                    // Format the duration as "h:mm:ss" or "m:ss"
                    let timeString = this.formatTime(duration);
                    this.durationLabel.setAttribute("value", timeString);

                    // "durationValue" property is used by scale binding to
                    // generate accessible name.
                    this.scrubber.durationValue = timeString;

                    // If the duration is over an hour, thumb should show h:mm:ss instead of mm:ss
                    this.scrubberThumb.showHours = (duration >= 3600000);

                    this.scrubber.max = duration;
                    // XXX Can't set increment here, due to bug 473103. Also, doing so causes
                    // snapping when dragging with the mouse, so we can't just set a value for
                    // the arrow-keys.
                    //this.scrubber.increment = duration / 50;
                    this.scrubber.pageIncrement = Math.round(duration / 10);
                },

                seekToPosition : function(newPosition) {
                    newPosition /= 1000; // convert from ms
                    this.log("+++ seeking to " + newPosition);
                    this.video.currentTime = newPosition;
                },

                setVolume : function(newVolume) {
                    this.log("*** setting volume to " + newVolume);
                    this.video.volume = newVolume;
                    this.video.muted = false;
                },

                showPosition : function(currentTime, duration) {
                    // If the duration is unknown (because the server didn't provide
                    // it, or the video is a stream), then we want to fudge the duration
                    // by using the maximum playback position that's been seen.
                    if (currentTime > this.maxCurrentTimeSeen)
                        this.maxCurrentTimeSeen = currentTime;
                    if (isNaN(duration))
                      duration = this.maxCurrentTimeSeen;
                    this.showDuration(duration);

                    this.log("time update @ " + currentTime + "ms of " + duration + "ms");

                    this.positionLabel.setAttribute("value", this.formatTime(currentTime));
                    this.scrubber.value = currentTime;
                },

                showBuffered : function() {
                    function bsearch(haystack, needle, cmp) {
                        var length = haystack.length;
                        var low = 0;
                        var high = length;
                        while (low < high) {
                            var probe = low + ((high - low) >> 1);
                            var r = cmp(haystack, probe, needle);
                            if (r == 0) {
                                return probe;
                            } else if (r > 0) {
                                low = probe + 1;
                            } else {
                                high = probe;
                            }
                        }
                        return -1;
                    }

                    function bufferedCompare(buffered, i, time) {
                        if (time > buffered.end(i)) {
                            return 1;
                        } else if (time >= buffered.start(i)) {
                            return 0;
                        }
                        return -1;
                    }

                    var duration = Math.round(this.video.duration * 1000);
                    if (isNaN(duration))
                        duration = this.maxCurrentTimeSeen;

                    // Find the range that the current play position is in and use that
                    // range for bufferBar.  At some point we may support multiple ranges
                    // displayed in the bar.
                    var currentTime = this.video.currentTime;
                    var buffered = this.video.buffered;
                    var index = bsearch(buffered, currentTime, bufferedCompare);
                    var endTime = 0;
                    if (index >= 0) {
                        endTime = Math.round(buffered.end(index) * 1000);
                    }
                    this.bufferBar.max = duration;
                    this.bufferBar.value = endTime;
                },

                onVolumeMouseInOut : function (event) {
                    // Ignore events caused by transitions between mute button and volumeStack,
                    // or between nodes inside these two elements.
                    if (this.isEventWithin(event, this.muteButton, this.volumeStack))
                        return;
                    var isMouseOver = (event.type == "mouseover");
                    this.startFade(this.volumeStack, isMouseOver);
                },

                onMouseInOut : function (event) {
                    // If the controls are static, don't change anything.
                    if (!this.dynamicControls)
                        return;

                    // Ignore events caused by transitions between child nodes.
                    // Note that the videocontrols element is the same
                    // size as the *content area* of the video element,
                    // but this is not the same as the video element's
                    // border area if the video has border or padding.
                    if (this.isEventWithin(event, this.videocontrols))
                        return;

                    var isMouseOver = (event.type == "mouseover");

                    // Suppress fading out the controls until the video has rendered
                    // its first frame. But since autoplay videos start off with no
                    // controls, let them fade-out so the controls don't get stuck on.
                    if (!this.firstFrameShown && !isMouseOver &&
                        !(this.video.autoplay && this.video.mozAutoplayEnabled))
                        return;

                    this.startFade(this.controlBar, isMouseOver);
                },

                startFadeIn : function (element, immediate) {
                    this.startFade(element, true, immediate);
                },

                startFadeOut : function (element, immediate) {
                    this.startFade(element, false, immediate);
                },

                startFade : function (element, fadeIn, immediate) {
                    // Bug 493523, the scrubber doesn't call valueChanged while hidden,
                    // so our dependent state (eg, timestamp in the thumb) will be stale.
                    // As a workaround, update it manually when it first becomes unhidden.
                    if (element.className == "controlBar" && fadeIn && element.hidden)
                        this.scrubber.valueChanged("curpos", this.video.currentTime * 1000, false);

                    if (immediate)
                        element.setAttribute("immediate", true);
                    else
                        element.removeAttribute("immediate");

                    if (fadeIn) {
                        element.setAttribute("hidden", false);
                        // force style resolution, so that transition begins
                        // when we remove the attribute.
                        element.clientTop;
                        element.removeAttribute("fadeout");
                    } else {
                        element.setAttribute("fadeout", true);
                    }
                },

                onTransitionEnd : function (event) {
                    // Ignore events for things other than opacity changes.
                    if (event.propertyName != "opacity")
                        return;

                    var element = event.originalTarget;

                    // Nothing to do when a fade *in* finishes.
                    if (!element.hasAttribute("fadeout"))
                        return;

                    element.setAttribute("hidden", true);
                },

                togglePause : function () {
                    if (this.video.paused || this.video.ended)
                        this.video.play();
                    else
                        this.video.pause();

                    // We'll handle style changes in the event listener for
                    // the "play" and "pause" events, same as if content
                    // script was controlling video playback.
                },

                toggleMute : function () {
                    this.video.muted = !this.video.muted;

                    // We'll handle style changes in the event listener for
                    // the "volumechange" event, same as if content script was
                    // controlling volume.
                },

                setPlayButtonState : function(aPaused) {
                  this.playButton.setAttribute("paused", aPaused);

                  var attrName = aPaused ? "playlabel" : "pauselabel";
                  var value = this.playButton.getAttribute(attrName);
                  this.playButton.setAttribute("aria-label", value);
                },

                setMuteButtonState : function(aMuted) {
                  this.muteButton.setAttribute("muted", aMuted);

                  var attrName = aMuted ? "unmutelabel" : "mutelabel";
                  var value = this.muteButton.getAttribute(attrName);
                  this.muteButton.setAttribute("aria-label", value);
                },

                keyHandler : function(event) {
                    // Ignore keys when content might be providing its own.
                    if (!this.video.hasAttribute("controls"))
                        return;

                    var keystroke = "";
                    if (event.altKey)
                        keystroke += "alt-";
                    if (event.shiftKey)
                        keystroke += "shift-";
#ifdef XP_MACOSX
                    if (event.metaKey)
                        keystroke += "accel-";
                    if (event.ctrlKey)
                        keystroke += "control-";
#else
                    if (event.metaKey)
                        keystroke += "meta-";
                    if (event.ctrlKey)
                        keystroke += "accel-";
#endif

                    switch (event.keyCode) {
                        case KeyEvent.DOM_VK_UP:
                            keystroke += "upArrow";
                            break;
                        case KeyEvent.DOM_VK_DOWN:
                            keystroke += "downArrow";
                            break;
                        case KeyEvent.DOM_VK_LEFT:
                            keystroke += "leftArrow";
                            break;
                        case KeyEvent.DOM_VK_RIGHT:
                            keystroke += "rightArrow";
                            break;
                        case KeyEvent.DOM_VK_HOME:
                            keystroke += "home";
                            break;
                        case KeyEvent.DOM_VK_END:
                            keystroke += "end";
                            break;
                    }

                    if (String.fromCharCode(event.charCode) == ' ')
                        keystroke += "space";

                    this.log("Got keystroke: " + keystroke);
                    var oldval, newval;

                    try {
                        switch (keystroke) {
                            case "space": /* Play */
                                this.togglePause();
                                break;
                            case "downArrow": /* Volume decrease */
                                oldval = this.video.volume;
                                this.video.volume = (oldval < 0.1 ? 0 : oldval - 0.1);
                                this.video.muted = false;
                                break;
                            case "upArrow": /* Volume increase */
                                oldval = this.video.volume;
                                this.video.volume = (oldval > 0.9 ? 1 : oldval + 0.1);
                                this.video.muted = false;
                                break;
                            case "accel-downArrow": /* Mute */
                                this.video.muted = true;
                                break;
                            case "accel-upArrow": /* Unmute */
                                this.video.muted = false;
                                break;
                            case "leftArrow": /* Seek back 15 seconds */
                            case "accel-leftArrow": /* Seek back 10% */
                                oldval = this.video.currentTime;
                                if (keystroke == "leftArrow")
                                    newval = oldval - 15;
                                else
                                    newval = oldval - (this.video.duration || this.maxCurrentTimeSeen / 1000) / 10;
                                this.video.currentTime = (newval >= 0 ? newval : 0);
                                break;
                            case "rightArrow": /* Seek forward 15 seconds */
                            case "accel-rightArrow": /* Seek forward 10% */
                                oldval = this.video.currentTime;
                                var maxtime = (this.video.duration || this.maxCurrentTimeSeen / 1000);
                                if (keystroke == "rightArrow")
                                    newval = oldval + 15;
                                else
                                    newval = oldval + maxtime / 10;
                                this.video.currentTime = (newval <= maxtime ? newval : maxtime);
                                break;
                            case "home": /* Seek to beginning */
                                this.video.currentTime = 0;
                                break;
                            case "end": /* Seek to end */
                                this.video.currentTime = (this.video.duration || this.maxCurrentTimeSeen / 1000);
                                break;
                            default:
                                return;
                        }
                    } catch(e) { /* ignore any exception from setting .currentTime */ }

                    event.preventDefault(); // Prevent page scrolling
                },

                isEventWithin : function (event, parent1, parent2) {
                    function isDescendant (node) {
                        while (node) {
                            if (node == parent1 || node == parent2)
                                return true;
                            node = node.parentNode;
                        }
                        return false;
                    }
                    return isDescendant(event.target) && isDescendant(event.relatedTarget);
                },

                log : function (msg) {
                    if (this.debug)
                        dump("videoctl: " + msg + "\n");
                },

                init : function (binding) {
                    this.video = binding.parentNode;
                    this.videocontrols = binding;
                    this.isAudioOnly = (this.video instanceof HTMLAudioElement);

                    this.statusIcon    = document.getAnonymousElementByAttribute(binding, "class", "statusIcon");
                    this.controlBar    = document.getAnonymousElementByAttribute(binding, "class", "controlBar");
                    this.playButton    = document.getAnonymousElementByAttribute(binding, "class", "playButton");
                    this.muteButton    = document.getAnonymousElementByAttribute(binding, "class", "muteButton");
                    this.volumeControl = document.getAnonymousElementByAttribute(binding, "class", "volumeControl");
                    this.volumeStack   = document.getAnonymousElementByAttribute(binding, "class", "volumeStack");
                    this.progressBar   = document.getAnonymousElementByAttribute(binding, "class", "progressBar");
                    this.bufferBar     = document.getAnonymousElementByAttribute(binding, "class", "bufferBar");
                    this.scrubber      = document.getAnonymousElementByAttribute(binding, "class", "scrubber");
                    this.scrubberThumb = document.getAnonymousElementByAttribute(this.scrubber, "class", "scale-thumb");
                    this.durationLabel = document.getAnonymousElementByAttribute(binding, "class", "durationLabel");
                    this.positionLabel = document.getAnonymousElementByAttribute(binding, "class", "positionLabel");
                    this.statusOverlay = document.getAnonymousElementByAttribute(binding, "class", "statusOverlay");

                    this.setupInitialState();

                    // videocontrols.css hides the control bar by default, because if script
                    // is disabled our binding's script is disabled too (bug 449358). Thus,
                    // the controls are broken and we don't want them shown. But if script is
                    // enabled, the code here will run and can explicitly unhide the controls.
                    //
                    // For videos with |autoplay| set, we'll leave the controls initially hidden,
                    // so that they don't get in the way of the playing video. Otherwise we'll
                    // go ahead and reveal the controls now, so they're an obvious user cue.
                    //
                    // (Note: the |controls| attribute is already handled via layout/style/html.css)
                    var shouldShow = (!(this.video.autoplay && this.video.mozAutoplayEnabled) || !this.dynamicControls);
                    this.startFade(this.controlBar, shouldShow, true);

                    // Use the handleEvent() callback for all media events.
                    // The "error" event listener must capture, so that it can trap error events
                    // from the <source> children, which don't bubble.
                    for each (var event in this.videoEvents)
                        this.video.addEventListener(event, this, (event == "error") ? true : false);

                    var self = this;
                    this.muteButton.addEventListener("command", function() { self.toggleMute(); }, false);
                    this.playButton.addEventListener("command", function() { self.togglePause(); }, false);
                    if (!this.isAudioOnly) {
                      this.muteButton.addEventListener("mouseover",  function(e) { self.onVolumeMouseInOut(e); }, false);
                      this.muteButton.addEventListener("mouseout",   function(e) { self.onVolumeMouseInOut(e); }, false);
                      this.volumeStack.addEventListener("mouseover", function(e) { self.onVolumeMouseInOut(e); }, false);
                      this.volumeStack.addEventListener("mouseout",  function(e) { self.onVolumeMouseInOut(e); }, false);
                    }

                    this.videocontrols.addEventListener("transitionend", function(e) { self.onTransitionEnd(e); }, false);

                    // Make the <video> element keyboard accessible.
                    this.video.setAttribute("tabindex", 0);
                    this.video.addEventListener("keypress", function (e) { self.keyHandler(e) }, false);

                    this.log("--- videocontrols initialized ---");
                }
            }) ]]>
        </field>


    </implementation>

    <handlers>
        <handler event="mouseover">
            this.Utils.onMouseInOut(event);
        </handler>
        <handler event="mouseout">
            this.Utils.onMouseInOut(event);
        </handler>
    </handlers>
  </binding>
  
  <binding id="touchControls" extends="chrome://global/content/bindings/videocontrols.xml#videoControls">

    <xbl:content xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" class="mediaControlsFrame">
        <stack flex="1">
            <vbox flex="1" class="statusOverlay" hidden="true">
                <box class="statusIcon"/>
            </vbox>

            <vbox class="controlsOverlay">
                <spacer class="controlsSpacer" flex="1"/>
                <vbox class="controlBar" hidden="true">
                    <hbox class="buttonsBar">
                        <spacer flex="1"/>
                        <button class="playButton"
                                playlabel="&playButton.playLabel;"
                                pauselabel="&playButton.pauseLabel;"/>
                        <spacer flex="1"/>
                        <button class="muteButton"
                                mutelabel="&muteButton.muteLabel;"
                                unmutelabel="&muteButton.unmuteLabel;"/>
                        <stack class="volumeStack" hidden="true" fadeout="true">
                            <box class="volumeBackgroundBar"/>
                            <scale class="volumeControl" orient="vertical" dir="reverse" movetoclick="true"/>
                        </stack>
                    </hbox>
                    <stack class="scrubberStack" flex="1">
                        <box class="backgroundBar"/>
                        <progressmeter class="bufferBar"/>
                        <progressmeter class="progressBar" max="10000"/>
                        <scale class="scrubber" movetoclick="true"/>
                    </stack>
                    <vbox class="durationBox">
                        <label class="positionLabel" role="presentation"/>
                        <label class="durationLabel" role="presentation"/>
                    </vbox>
                </vbox>
            </vbox>
        </stack>
    </xbl:content>

    <implementation>

        <constructor>
          this.TouchUtils.init(this);
        </constructor>

        <field name="TouchUtils">
          <![CDATA[ ({
            videocontrols: null,
            controlsTimer : null,
            controlsTimeout : 5000,
            positionLabel: null,

            get Utils() {
              return this.videocontrols.Utils;
            },
            
            get visible() {
              return !this.Utils.controlBar.hasAttribute("fadeout") || !this.Utils.controlBar.hasAttribute("hidden");
            },

            _firstShow: false,
            get firstShow() { return this._firstShow; },
            set firstShow(val) {
              this._firstShow = val;
              this.Utils.controlBar.setAttribute("firstshow", val);
            },

            toggleControls: function() {
              if (!this.Utils.dynamicControls || !this.visible)
                this.showControls();
              else
                this.delayHideControls(0);
            },

            showControls : function() {
              let event = document.createEvent("MouseEvents");
              event.initEvent("mouseover", true, true);
              this.Utils.videocontrols.dispatchEvent(event);

              this.delayHideControls(this.controlsTimeout);
            },
            
            delayHideControls : function(aTimeout) {
              if (this.controlsTimer) {
                clearTimeout(this.controlsTimer);
                this.controlsTimer = null;
              }
              let self = this;
              this.controlsTimer = setTimeout(function() {
                self.hideControls();
              }, aTimeout);
            },

            hideControls : function() {
              let event = document.createEvent("MouseEvents");
              event.initEvent("mouseout", true, true);
              this.Utils.videocontrols.dispatchEvent(event);

              if (this.firstShow)
                this.videocontrols.addEventListener("transitionend", this, false);
            },

            handleEvent : function (aEvent) {
              if (aEvent.type == "transitionend") {
                this.firstShow = false;
                this.videocontrols.removeEventListener("transitionend", this, false);
                return;
              }

              if (this.videocontrols.randomID != this.Utils.randomID)
                this.terminateEventListeners();

            },

            terminateEventListeners : function () {
              for each (var event in this.videoEvents)
                this.Utils.video.removeEventListener(event, this, false);
            },

            init : function (binding) {
              this.videocontrols = binding;
              var video = binding.parentNode;

              let self = this;
              this.Utils.playButton.addEventListener("command", function() {
                if (!self.Utils.video.paused)
                    self.delayHideControls(0);
                else 
                    self.showControls();
              }, false);
              this.Utils.scrubber.addEventListener("click", function() { self.delayHideControls(self.controlsTimeout); }, false);
              this.Utils.muteButton.addEventListener("click", function() { self.delayHideControls(self.controlsTimeout); }, false);

              if (!video.autoplay && this.Utils.dynamicControls)
                this.firstShow = true;
            }
          }) ]]>
        </field>

    </implementation>

    <handlers>
        <handler event="mouseup">
          if(event.originalTarget.nodeName == "vbox") {
            if (this.TouchUtils.firstShow)
              this.Utils.video.play();
            this.TouchUtils.toggleControls();
          }
        </handler>
    </handlers>

  </binding>
</bindings>
